Abstract
Abstract Two wheat genotypes differing in water stress sensitivity (C306, relatively tolerant; HD2329, relatively susceptible) were water stressed during early grain filling by withholding water for 7 days at watery‐ripe (WR) stage and examined for water status, abscisic acid (ABA) and osmolytes in grains as well as in flag leaf (FL). Both the genotypes differed significantly from each other in endogenous levels of ABA, proline, glycine betaine, total soluble sugars, reducing sugars, sucrose and potassium. The tolerant genotype showed higher content of ABA, proline, glycine betaine, total sugars, reducing sugars and had higher water content in its FL and grains than the susceptible genotype, which contained more of glycine beatine and potassium but had lower ABA and water content in its FL and grains. Although carbohydrates constituted the major amount of all the solutes, proline and glycine betaine increased manifold during stress. Exogenous application of 2 μ m ABA at 5 days after anthesis to FL of stressed plants increased the endogenous content of ABA, accelerated the accumulation of osmolytes, improved the water status of FL and grains that resulted in higher grain weight, especially in the susceptible genotype. Differential response of contrasting wheat genotypes to water stress may be governed by ABA‐dependent solute accumulation in grains and FL.
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Claims 10
Claim · model-written summary
The two wheat genotypes differed significantly in ABA, proline, glycine betaine, soluble sugars, reducing sugars, sucrose, and potassium.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- genotypese0
- Outcome
- endogenous levels of ABA, proline, glycine betaine, total soluble sugars, reducing sugars, sucrose and potassiume0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both the genotypes differed significantly from each other in endogenous levels of ABA, proline, glycine betaine, total soluble sugars, reducing sugars, sucrose and potassium”
t0“Wheat”
Claim · model-written summary
The tolerant wheat genotype had higher ABA, proline, glycine betaine and sugar content than the susceptible genotype.
- Taxon
- WheatTriticum aestivumt0
- Material
- tolerant genotypee0
- Outcome
- content of ABA, proline, glycine betaine, total sugars, reducing sugarse0
- Direction
- highere0
- Comparator
- susceptible genotypee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tolerant genotype showed higher content of ABA, proline, glycine betaine, total sugars, reducing sugars”
e1“than the susceptible genotype”
t0“Wheat”
Claim · model-written summary
The tolerant genotype had higher water content in flag leaves and grains than the susceptible genotype.
- Taxon
- WheatTriticum aestivumt0
- Material
- susceptible genotypee0
- Organ / stage
- FL and grainse0
- Outcome
- water contente0
- Direction
- highere0
- Comparator
- susceptible genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had higher water content in its FL and grains than the susceptible genotype”
t0“Wheat”
Claim · model-written summary
The susceptible genotype contained more glycine betaine and potassium but less ABA and water.
- Taxon
- WheatTriticum aestivumt0
- Material
- susceptible genotypee1
- Outcome
- glycine beatine and potassiume0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which contained more of glycine beatine and potassium but had lower ABA and water content in its FL and grains”
e1“than the susceptible genotype, which contained”
t0“Wheat”
Claim · model-written summary
Proline and glycine betaine increased manifold during water stress.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- water stressede1
- Outcome
- proline and glycine betainee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline and glycine betaine increased manifold during stress”
e1“water stressed”
t0“Wheat”
Claim · model-written summary
Exogenous ABA increased endogenous ABA in stressed wheat.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- FLe0
- Treatment
- Exogenous application of 2 μ m ABAe0
- Outcome
- endogenous content of ABAe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of 2 μ m ABA at 5 days after anthesis to FL of stressed plants increased the endogenous content of ABA”
t0“Wheat”
Claim · model-written summary
Exogenous ABA accelerated osmolyte accumulation in stressed wheat.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Exogenous application of 2 μ m ABAe0
- Outcome
- accumulation of osmolytese0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of 2 μ m ABA at 5 days after anthesis to FL of stressed plants increased the endogenous content of ABA, accelerated the accumulation of osmolytes”
t0“Wheat”
Claim · model-written summary
Exogenous ABA improved water status of flag leaves and grains in stressed wheat.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Exogenous application of 2 μ m ABAe1
- Outcome
- water status of FL and grainse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improved the water status of FL and grains”
e1“Exogenous application of 2 μ m ABA”
t0“Wheat”
Claim · model-written summary
Exogenous ABA raised grain weight, especially in the susceptible genotype.
- Taxon
- WheatTriticum aestivumt0
- Material
- susceptible genotypee0
- Treatment
- Exogenous application of 2 μ m ABAe1
- Outcome
- grain weighte0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulted in higher grain weight, especially in the susceptible genotype”
e1“Exogenous application of 2 μ m ABA”
t0“Wheat”
Claim · model-written summary
The authors suggest that genotype differences in water stress response may be governed by ABA dependent solute accumulation.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- Differential response of contrasting wheat genotypes to water stresse0
- Qualifier
- ABA‐dependent solute accumulation in grains and FLe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differential response of contrasting wheat genotypes to water stress may be governed by ABA‐dependent solute accumulation in grains and FL”
t0“Wheat”
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